* {
  margin: 0;
  padding: 0;
}

#body {
  background-color: white;
}

a {
  text-decoration: none;
}

ul {
  list-style: none;
}

.clearfix::after {
  content: "";
  display: block;
  clear: both;
}

.back-to-top-hidden {
  display: none;
}

.back-to-top {
  height: 30px;
  width: 30px;
  background-color: #e7e7e7;
  position: fixed;
  right: 50px;
  bottom: 50px;
}

.back-to-top a {
  position: absolute;
  top: 0px;
  left: 8px;
  color: #333;
  font-size: 25px;
}

.back-to-top a :hover {
  text-decoration: none;
}

header {
  background-color: white;
  height: 70px;
  border-bottom: 1px solid #999;
}

header .head {
  width: 1200px;
  height: 70px;
  margin: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

header .head img {
  height: 70px;
}

.banner {
  height: 450px;
  width: 1600px;
  margin: auto;
  display: flex;
  justify-content: space-between;
  background-image: url(../img/login-banner.png);
  background-position: 350px 0;
}

.banner .login {
  width: 350px;
  height: 450px;
  background-color: rgba(255, 255, 255, 0.3);
  box-sizing: border-box;
  padding-top: 80px;
  margin-left: 300px;
}

.banner .login ul {
  font-size: 18px;
  color: white;
}

.banner .login ul li {
  float: right;
  margin: 30px 20px 30px 0;
}

.banner .login ul li input {
  height: 40px;
  width: 250px;
  font-size: 18px;
  border: 1px solid #999;
  border-radius: 10px;
  padding-left: 10px;
}

.banner .login ul li input:focus {
  outline: none;
  border: 1px solid orange;
}

.banner .login ul li input::placeholder {
  font-weight: 200;
  font-size: 18px;
  color: #bbbbbb;
}

.banner .login .message {
  color: yellow;
  margin-left: 40px;
  margin-top: -16px;
  margin-bottom: 10px;
  height: 24px;
}

.banner .login button {
  height: 45px;
  width: 120px;
  margin-left: 50px;
  font-size: 20px;
  color: white;
  text-align: center;
  border-radius: 10px;
  border: none;
  background-image: linear-gradient(to right, orange 0, red 100%);
  vertical-align: bottom;
}

.banner .login span {
  margin-left: 10px;
}

.banner .login span a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
  vertical-align: bottom;
}

footer {
  height: 300px;
  margin-top: 20px;
  background-color: white;
}

footer .footer-inner {
  height: 200px;
  width: 1200px;
  margin: auto;
  display: flex;
  justify-content: space-around;
  border-bottom: 1px solid #333;
}

footer .footer-inner .module {
  width: 180px;
}

footer .footer-inner .module .module-head {
  padding: 20px 3px 10px 3px;
  border-bottom: 1px solid #bbbbbb;
  font-size: 16px;
  color: #999;
  font-weight: bold;
}

footer .footer-inner .module ul {
  list-style-type: disc;
  margin: 10px 20px;
  font-size: 14px;
}

footer .footer-inner .module ul li {
  margin: 5px 0;
}

footer .footer-inner .module ul li a {
  color: #666;
}

footer .footer-list {
  height: 60px;
  width: 1200px;
  margin: auto;
  margin-top: 20px;
}

footer .footer-list ul {
  width: 800px;
  display: flex;
  justify-content: space-between;
  color: #666;
  margin: auto;
}

footer .footer-list ul li div {
  width: 1px;
  background-color: #999;
  height: 100%;
}

footer .footer-list ul li a {
  font-size: 14px;
  color: #999;
}

footer .footer-list .last {
  font-size: 12px;
  margin-top: 10px;
  text-align: center;
  color: #999;
}
